dabble vs plunge

dabble is not a noun while plunge is a noun.

Word	Noun	Adjective	Verb	Adverb
dabble	No	No	Yes	No
plunge	Yes	No	Yes	No

As verbs, plunge is a hypernym of dabble; that is, plunge is a word with a broader meaning than dabble:

Other hypernyms of dabble include dip, douse, dunk, souse.

dabble (noun)	plunge (noun)
	a brief swim in water
	a steep and rapid fall

dabble (verb)	plunge (verb)
dip a foot or hand briefly into a liquid	begin with vigor
bob forward and under so as to feed off the bottom of a body of water	devote (oneself) fully to
play in or as if in water, as of small children	cause to be immersed
work with in an amateurish manner	immerse briefly into a liquid so as to wet, coat, or saturate
	thrust or throw into
	fall abruptly
	drop steeply
	dash violently or with great speed or impetuosity